Tooth for dippers of excavators.



No. 784,116. PATENTED MAR. 7, 1905. J. A. MUCASKEY.

TOOTH FOR DIPPERS OF EXGAVATORfi APPLIOATION TILED MAY11. 1904,

No. 784,1 1e.

rrlEo Saree Patented March 7, 1905.

PATENT OFFICE,

TQUTH FUR DIPPERS OF EXCAVATOH5.

SPECIFICATION forming part of Letters Patent No. 784,116, dated IVIarch '7, 1905.

Application filed May 11, 1904. Serial No. 207,4 15.

To (tZl whom it may concern:

Be it known that 1, JOHN A. MoUAsK'nY, a citizen of the United States, residing at Hubbard, in the county of Trumbull and State of Ohio, haveinvented certain new and useful improvements in Teeth for Dippers of Excavators, of which the following is a specification.

This invention provides an improved form of tooth for use in connection with the dipper or shovel of steam shovels or excavators, and aims, essentially, to provide a special construction thereof by which the hard detachable point of the tooth may be secured to the body of the same in such a manner as to produce a maximum degree of substantiality of this member and admitting of ready removal of the point.

r The invention primarily aims to obviate the use of rivets or like fastenings for attaching the point to the tooth, this manner of securing the point being disadvantageous, for the reason that these fastenings are subjected to direct wear as the shovel or dipper is operated, such wear causing the said fastenings to soon become useless and necessitating the frequent removal thereof and incident disadvantages sequential to the above.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the following description and accompanying drawings.

While the essential and characteristic features of the invention are susceptible of modilication, still the preferred embodiment of the invention is illustrated in the accompanying drawings, in which Figure 1 is a perspective View. vertical longitudinal sectional view. a perspective view, parts separated.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The general form of my tooth is substantially the same as those in common use, and it comprises the body 1, from which extends Fig. 2 is a Fig. 3 is the shank 2 and an extension 3, spaced from the shank. The body of the tooth when secured to the dipper receives the body of the dipper between the shank 2 and the spaced extension 3. Fastenings in the form of rivets or the like are utilized to hold the tooth in position upon the body of the dipper or shovel, said fastenings passing through openings 4 in the shank 2 and in the extension 3, above described.

The essential feature of my invention, as before mentioned, resides in the manner of attaching the point 5 of the tooth to the body 1 thereof. The point itself is beveled upon its upper side in the usual manner, and the same is attached to the body 1 by a threaded connection therewith. The threaded connection by which the point 5 is held upon the body 1 consists of a threaded extension 6, integrally formed with the body 1, which is received by a threaded socket or recess 7 in the point 5. The extension 6 is disposed about centrally of the end of the body 1, and this extension is tapered slightly to more firmly bind within the recess or socket 7 when the point is screwed upon the body 1 of the tooth, and from the foregoing it will be noted that the extension is completely housed and protected, which is an extremely advantageous construction in adevice of this class.

The connection between the point and the body of the tooth being completely protected, the same is not subjected to the wearing action ordinarily received upon the fastening or rivets by which the points have been secured to the bodies of the teeth. The connection also is such that the point 5 may be readily and quickly removed from the body 1 by the application of an ordinary implement, such as a wrench, which is adapted to screw or unscrew the point whenever this becomes necessary. There is, further, comparatively no likelihood of displacement of the point 5 from the body of the tooth, since the actual use of the tooth only serves to cause the extension 6 of the body to more firmly bind within the recess or socket 7 of the point 5.

Having thus described the invention, what is claimed as new is--- In testimony whereof I affix'my signature in presence of two wltnesses.

JOHN A. MoGASKEY. [L. SJ

As an article of manufacture. adipper-tooth for excavators comprising a body adapted to be secured to the dipper, a point, the point being provided with a threaded socket or re- 5 cess, and a threaded extension projected from i/Vitnesses:

ROBERT E. PUGH. 

